Need help factoring and solving
1 answer:
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Answer:
And the best option would be:
a. ŷ= 37.643-1.0543x
Step-by-step explanation:
We assume that the data is this one:
x: 34.0, 32.5, 35.0, 31.0, 30.0, 27.5, 29.0
y: 1.30, 3.25, 0.65, 6.50, 5.85, 8.45, 6.50
Find the least-squares line appropriate for this data.
For this case we need to calculate the slope with the following formula:
Where:
So we can find the sums like this:
With these we can find the sums:
And the slope would be:
Nowe we can find the means for x and y like this:
And we can find the intercept using this:
So the line would be given by:
And the best option would be:
a. ŷ= 37.643-1.0543x
Answer: Our required probability is 0.88.
Step-by-step explanation:
Since we have given that
Number of male students are smokers = 10
Number of male students are non smokers = 490
total number of male students = 500
Number of female students are smokers = 40
Number of female students are non smokers = 363
Total number of female students = 403
Probability that both are non smokers is given by
Hence, our required probability is 0.88.